func registrationFee(msrp: Int, yearsOld: Int) -> Int {

if yearsOld >= 10 { let fee: Int = 25 return fee } else { var fee: Int if msrp > 25000 { fee = (msrp yearsOld Int(0.1))/100 //answer become zero if i convert Double to Int. return fee } else { fee = (25000 yearsOld Int(0.10))/100 //this one too. return fee } }
}